Tapuwae Poharutanga o Tukutuku was a Māori upoko ariki (head chieftain) of the Ngāti Kahungunu iwi and Ngāi Tamaterangi hapū in the Wairoa area of Hawke Bay of New Zealand. He developed a fierce rivalry with his brother, Te Maaha, and as a result, their father, Te Okuratawhiti, split the Wairoa River valley between them, giving Tapuwae the eastern bank. The brothers are said to continue their rivalry as a pair of taniwha at the river's mouth. Tapuwae established eight pā (fortified villages) along the river, which he split between his two wives, Te Rauhina and Ruataumata. Later, he led a war party to Tologa Bay to get revenge for the murder of his great-grandfather Tama-te-rangi. Mostly, however, he was a man of peace. In his later life, he exercised great forbearance when his position was challenged by two tohunga Manawa and Kowhaki and treated the visiting chief Taharakau in a generous and friendly manner.